SEMI-SOLID ELECTRODES HAVING HIGH RATE CAPABILITY
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Abstract
Embodiments described herein relate generally to electrochemical cells having high rate capability, and more particularly to devices, systems and methods of producing high capacity and high rate capability batteries having relatively thick semi-solid electrodes. In some embodiments, an electrochemical cell includes an anode and a semi-solid cathode. The semi-solid cathode includes a suspension of an active material of about 35% to about 75% by volume of an active material and about 0.5% to about 8% by volume of a conductive material in a non-aqueous liquid electrolyte. An ion-permeable membrane is disposed between the anode and the semi-solid cathode. The semi-solid cathode has a thickness of about 250 μm to about 2,000 μm, and the electrochemical cell has an area specific capacity of at least about 7 mAh/cm2 at a C-rate of C/4. In some embodiments, the semi-solid cathode slurry has a mixing index of at least about 0.9.
67 Citations
56 Claims
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1-29. -29. (canceled)
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30. An electrochemical cell, comprising:
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an anode; a semi-solid cathode including a suspension of a conductive material and about 35% to about 75% by volume of an active material in a non-aqueous liquid electrolyte; and an ion-permeable membrane disposed between the anode and the semi-solid cathode, wherein the semi-solid cathode has a thickness in the range of about 250 μ
m to about 2,500 μ
m, andwherein the electrochemical cell has an area specific capacity of at least about 7 mAh/cm2 at a C-rate of C/4. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. An electrochemical cell, comprising:
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a semi-solid anode including a suspension of about 35% to about 75% by volume of a first active material and 0% to about 10% by volume of a first conductive material in a first non-aqueous liquid electrolyte; a semi-solid cathode including a suspension of about 35% to about 75% by volume of a second active material and about 0.5% to about 8% by volume of a second conductive material in a second non-aqueous liquid electrolyte; and an ion-permeable membrane disposed between the semi-solid anode and the semi-solid cathode, wherein, the semi-solid anode and the semi-solid cathode each have a thickness in the range of about 250 urn to about 2,500 urn, and wherein the electrochemical cell has an area specific capacity of at least about 7 mAh/cm2 at a C-rate of C/4. - View Dependent Claims (44, 45, 46, 47, 48, 49)
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50. An electrochemical cell, comprising:
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a first electrode; a second electrode including a suspension of about 35% to about 75% by volume of an active material and about 0.5% to about 8% by volume of a conductive material in a non-aqueous liquid electrolyte; and an ion-permeable membrane disposed between the first electrode and the second electrode, wherein, the second electrode has a thickness in the range of about 250 μ
m to about 2,500 μ
m, andwherein the electrochemical cell has an area specific capacity of at least about 7 mAh/cm2 at a C-rate of C/4. - View Dependent Claims (51, 52, 53, 54, 55, 56)
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Specification